32
and disabling the low alarm (i.e. temperatures <10°C won’t trigger
alarm, but temperatures >+40°C will).
Alarm setting
Minimum
Maximum
Storm threshold
3 hPa
9 hPa
Relative Air
Pressure
920.0 hPa
1080.0 hPa
Outdoor
Temperature
-30.0°C
+69.9°C
Indoor
Temperature
-9.9°C. No alarm will
sound if the
minimum indoor
temperature alarm is
set below this value.
+59.9°C
Humidity (all)
1% RH
99% RH
Rainfall 24h
0.0 mm
1000 mm
Rainfall 1h
0.0 mm
1000 mm
Wind
0.0 m/s
50.0 m/s
Hysteresis
To compensate for fluctuation of the measured data, which may
cause the weather alarm to sound constantly if the measured reading
is close to user set level, a hysteresis function has been implemented
for each weather alarm. For example, if the high temperature alarm is
set to +25°C and the current value moves to +25°C, the alarm will be
activated (if it has been enabled). Now when the temperature drops to
+24.9°C or below and thereafter again increases to 25°C,
the data will be blinking, but no alarm will be activated. It has to drop
to below +24°C (with a pre-set hysteresis of 1°C) so that the alarm
can be produced again. Hysteresis values for the various weather
data types are given in the following table:
Weather data
Hysteresis
Temperature
1°C
Humidity
3% RH
Air pressure
1 hPa
Rainfall 24h
5.0 mm
Rainfall 1h
0.5 mm
Wind
10 km/h
